Method of melting and casting silicon.



UNITED STATES PATENT OFFICE.

HENRY NOEL POTTER, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO GEO. WESTINGHOUSE, OF PITTSBURG, PENNSYLVANIAL METHOD OF MELTING AND CASTING SILICON.

Isi o. 830,738.

Specification of Letters Patent.

Patented Sept. 11, 1906.

Application filed April 21, 1905. Serial No: 256.817.

10 all w/wm it"m/i y concern. 7

Be it known that I, HENRY NOEL PoTTER, a citizen of the United States, and a resident of, N ew Rochelle, county ofl/Vestchester, State of New York, have invented certain new and useful Improvements in Methods of Casting Silicon, of which the following is a specification.

I have discovered, that silicon possesses a novel property which is of valuein the arts and which makes it possible to cast silicon in contact with carbon as container. In other words, the carbon-furnace can be employed for fusing silicon, provided the temperature.

shape for silicon free from contained carbon or silicon carbid. In this way silicon can be cast for electric heating resistances or for making ingots of definite shape. Under the conditions named the silicon can be poured into molds of carbon or molds lubricated with graphite, which can afterward be brushed rom the completed casting.

I claim as my invention I .1. The method of meltin and casting sili con free from contained car on or silicon carbid, which consists in fusing the silicon in contact with carbon as a container, keeping the temperature too low to form silicon carbicl and pouring the molten silicon into suitable molds.

2. The method of meltin and casting silicon free from contained car on or silicon carbid, which consists in fusing the silicon in Signed at New York, in the county'of New' York and State of New York, this 20th day. of April, A. D. 1905.

HENRY NOEL POTTER.

Witnesses:

WM. H. CAPEL, GEORGE H. STOCKBRIDGE. 

